@article{10_4153_CJM_1979_085_6,
     author = {Stewart, C. L. and Tijdeman, R.},
     title = {On {Infinite-Difference} {Sets}},
     journal = {Canadian journal of mathematics},
     pages = {897--910},
     year = {1979},
     volume = {31},
     number = {5},
     doi = {10.4153/CJM-1979-085-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-085-6/}
}